Sodium-water reaction test to confirm thermal influence on heat transfer tubes

Nishimura, Masahiro ; Shimoyama, Kazuhito ; Kurihara, Akikazu ; Seino, Hiroshi 

Sodium-water reaction tests are carried out using the Sodium Water Reaction Test Rig.(SWAT-1R). The objective of this study is to obtain the experimental knowledge of following items. (1)Thermal characteristic of sodium-water reaction jet (2)Effects on heat transfer tubes by high temperature reaction jet Those are necessary to establish a systematic evaluate method for the failure propagation of FBR steam generator heat transfer tubes. Then we performed parametric three HT tests (series of test confirm thermal influence on tubes), and the parameter is water leak rate. Following items are clarified in this report. (1) (a)No difference was observed about the maxim temperature of reaction jet in each test. HT-1:1161C, HT-2:1013C, HT-3:1164C (b)The reaction jet became stable within ten seconds, and the jet size depended on water leak rate. (2) (a)The thermal data for calculating the heat transfer coefficient were obtained and it's evaluation method was established. (b)The thermal influence of heat transfer tubes suffered by more than 1100C high temperature jet in 20 seconds are almost equal to that of standardization test materials suffered by 900C in 20 seconds.